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方法一：根据路径下载图片
1 /// <summary> 2 /// 图片另存为 3 /// </summary> 4 /// <param name="url">路径</param> 5 public void imgsave(string url) 6 { 7 //http://203.156.245.58/sipgl/index.jsp 8 url = "http://203.156.245.58/sipgl/login/img"; 9 webrequest imgrequest = webrequest.create(url); 10 11 httpwebresponse res; 12 try 13 { 14 res = (httpwebresponse)imgrequest.getresponse(); 15 } 16 catch (webexception ex) 17 { 18 19 res = (httpwebresponse)ex.response; 20 } 21 22 if (res.statuscode.tostring() == "ok") 23 { 24 system.drawing.image downimage = system.drawing.image.fromstream(imgrequest.getresponse().getresponsestream()); 25 26 string deerory = string.format(@"d:\img\{0}\", datetime.now.tostring("yyyy-mm-dd")); 27 28 string filename = string.format("{0}.png", datetime.now.tostring("hhmmssffff")); 29 30 31 if (!system.io.directory.exists(deerory)) 32 { 33 system.io.directory.createdirectory(deerory); 34 } 35 downimage.save(deerory + filename); 36 downimage.dispose(); 37 } 38 39 } 40 41
方法二：根据路径下载图片
我要评论 1 /// <summary>
2 /// 下载图片
3 /// </summary>
4 /// <param name="picurl">图片http地址</param>
5 /// <param name="savepath">保存路径</param>
6 /// <param name="timeout">request最大请求时间，如果为-1则无限制</param>
7 /// <returns></returns>
8 public bool downloadpicture(string picurl, string savepath, int timeout)
9 {
10 picurl = "http://203.156.245.58/sipgl/login/img";
11 savepath = "d:/img/"+datetime.now.tostring("hhmmssffff")+".jpg";
12 bool value = false;
13 webresponse response = null;
14 stream stream = null;
15 try
16 {
17 httpwebrequest request = (httpwebrequest)webrequest.create(picurl);
18 if (timeout != -1) request.timeout = timeout;
19 response = request.getresponse();
20 stream = response.getresponsestream();
21 if (!response.contenttype.tolower().startswith("text/"))
22 value = savebinaryfile(response, savepath);
23 }
24 finally
25 {
26 if (stream != null) stream.close();
27 if (response != null) response.close();
28 }
29 return value;
30 }
31 private static bool savebinaryfile(webresponse response, string savepath)
32 {
33 bool value = false;
34 byte[] buffer = new byte[1024];
35 stream outstream = null;
36 stream instream = null;
37 try
38 {
39 if (file.exists(savepath)) file.delete(savepath);
40 outstream = system.io.file.create(savepath);
41 instream = response.getresponsestream();
42 int l;
43 do
44 {
45 l = instream.read(buffer, 0, buffer.length);
46 if (l > 0) outstream.write(buffer, 0, l);
47 } while (l > 0);
48 value = true;
49 }
50 finally
51 {
52 if (outstream != null) outstream.close();
53 if (instream != null) instream.close();
54 }
55 return value;
56 }
方法三 根据路径下载图片
1 public image getimage(string url,out string imagestrcookie)
2 {
3
4 httpwebrequest request = (httpwebrequest)webrequest.create("http://203.156.245.58/sipgl/login/img");
5 request.method = "get";
6 webresponse response = request.getresponse();
7 imagestrcookie = "";
8 if (response.headers.haskeys()&&null !=response.headers["set-cookie"])
9 {
10 imagestrcookie= response.headers.get("set-cookie");
11 }
12 return image.fromstream(response.getresponsestream());
13
14 }
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